Phnom Santuk is a cultural and natural site located in Ko Koh village, Ko Koh commune, Santuk district, about 17 kilometers south of Kkampong Thom provincial town. The site includes four mountains: Phnom Srah Khmao or Phnom Tbeng, Phnom Penchum or Phnom Kraper, Phnom Champa and Phnom Santuk.
On the top of the 180-meter high mountain, is a pagoda known as Wat Kirichaomchong Phnom Santuk. The pagoda gate at the foot of the mountain is very beautiful. This pagoda itself is reached by climbing an 809-step staircase that features a long concrete hand rail in the shape of Prohm carrying naga, which was constructed in 1996. Along the staircase, there are many big trees and large stones. Though a long hike, there are four points of interest on the climb to the mountaintop:
- At 230th step, there is an access to a rock valley and a well.
- At 455th step, there is a resting hall to the left, which has a Buddha statue
- At 620th step, there are large rocks and trees to offer shade for weary climbers.
- At 694th step, there are numbers of huge rocks at the right kown as Chanre. Between the rocks is a slit about 5 centimeters wide, 3 meters long and 6 meters deep.